Critical: Reset Root Login

It seems that someone played around with my ISPConfig installation.
Now I can't seem to login on either ISPConfig, nor phpMyAdmin.
I know I can reset login count through phpMyAdmin (I know that from my days in a webhosting company), but I also don't seem to be able to login on that.
MySQL hasn't been hacked, I can still login on MySQL through SSH.

So I want to know this:
What do I have to do, so I can login on phpMyAdmin?
If that's done, I know the rest.